Template Function thrust::transform(InputIterator, InputIterator, OutputIterator, UnaryFunction)

Function Documentation

template<typename InputIterator, typename OutputIterator, typename UnaryFunction>
OutputIterator thrust::transform(InputIterator first, InputIterator last, OutputIterator result, UnaryFunction op)

This version of transform applies a unary function to each element of an input sequence and stores the result in the corresponding position in an output sequence. Specifically, for each iterator i in the range [first, last) the operation op(*i) is performed and the result is assigned to *o, where o is the corresponding output iterator in the range [result, result + (last - first) ). The input and output sequences may coincide, resulting in an in-place transformation.

The following code snippet demonstrates how to use

transform
Return

The end of the output sequence.

Pre

first may equal result, but the range [first, last) shall not overlap the range [result, result + (last - first)) otherwise.

Parameters

  • first: The beginning of the input sequence.

  • last: The end of the input sequence.

  • result: The beginning of the output sequence.

  • op: The tranformation operation.

Template Parameters

  • InputIterator: is a model of Input Iterator and InputIterator's value_type is convertible to UnaryFunction's argument_type.

  • OutputIterator: is a model of Output Iterator.

  • UnaryFunction: is a model of Unary Function and UnaryFunction's result_type is convertible to OutputIterator's value_type.

#include <thrust/transform.h>
#include <thrust/functional.h>

int data[10] = {-5, 0, 2, -3, 2, 4, 0, -1, 2, 8};

thrust::negate<int> op;

thrust::transform(data, data + 10, data, op); // in-place transformation

// data is now {5, 0, -2, 3, -2, -4, 0, 1, -2, -8};

See

http://www.sgi.com/tech/stl/transform.html